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Watershed Location Page: Data & Maps

Data Source Summary

 

Below are all data sources used on the watershed-level location pages. Have questions about the data, maps, or statistics on Drought.gov? Email us at drought.portal@noaa.gov.

Data Source Type

Current Conditions

Data Sources
Source Name

U.S. Drought Monitor

Data Source Update Frequency/Last Updated
Updates Weekly
Data Source Description

Sources: NDMCNOAAUSDA

U.S. Drought Monitor data from the National Drought Mitigation Center (NDMC) were available in a GIS format.

Source Name

Temperature: 30-Day Departure from Normal

Data Source Update Frequency/Last Updated
Updates Daily
Data Source Description

Sources: UC MercedClimate Engine

The 30-day departure from normal temperature map shows the difference of the last 30 days from the usual conditions for the same time period averaged since 1980. This map uses the gridMET and PRISM temperature datasets, which are delayed from the current day by 2 to 3 days to allow for data collection and quality control. Temperature data from Climate Engine were available in raster format.

* Currently, data is only available for the contiguous U.S.
Source Name

Precipitation: 30-Day Percent of Normal

Data Source Update Frequency/Last Updated
Updates Daily
Data Source Description

Sources: UC MercedClimate Engine

The 30-day departure from normal temperature map shows the difference of the last 30 days from the usual conditions for the same time period averaged since 1980. This map uses the gridMET and PRISM temperature datasets, which are delayed from the current day by 2 to 3 days to allow for data collection and quality control. Temperature data from Climate Engine were available in raster format.

* Currently, data is only available for the contiguous U.S.
Data Source Type

Drought Indicator Blends

Data Sources
Source Name

Experimental Short-Term Drought Indicator Blend

Data Source Update Frequency/Last Updated
Updates Daily
Data Source Description

Sources: UC MercedClimate Engine

Drought blends data from Climate Engine were available in raster format. 

These experimental blends integrate several key drought monitoring products and indices into a single short-term or long-term product, based on the methodology developed at the NOAA Climate Prediction Center (CPC). The blends are created using the Climate Engine tool, and apply the CPC weighting ratios to the high-resolution gridMET gridded research dataset. The data is updated daily, with a delay of 2 to 3 days to allow for data collection and quality control.

The short-term blend combines PDSI, Z-Index, 1-month SPI, and 3-month SPI to estimate the overall short-term drought. 

This product is an example of current NIDIS-funded researchLearn more.

* Currently, data is only available for the contiguous U.S.
Source Name

Experimental Long-Term Drought Indicator Blend

Data Source Update Frequency/Last Updated
Updates Daily
Data Source Description

Sources: UC MercedClimate Engine

Drought blends data from Climate Engine were available in raster format. 

These experimental blends integrate several key drought monitoring products and indices into a single short-term or long-term product, based on the methodology developed at the NOAA Climate Prediction Center (CPC). The blends are created using the Climate Engine tool, and apply the CPC weighting ratios to the high-resolution gridMET gridded research dataset. The data is updated daily, with a delay of 2 to 3 days to allow for data collection and quality control.

The long-term blend combines PDSI, Z-Index, and 6-month, 1-year, 2-year, and 5-year SPI to estimate the overall long-term drought. 

This product is an example of current NIDIS-funded researchLearn more.

* Currently, data is only available for the contiguous U.S.
Data Source Type

Agriculture by Watershed Region

Data Sources
Source Name

Crops and Livestock in Drought

Data Source Description

Sources: USDA National Agricultural Statistics ServiceU.S. Drought Monitor

County-level commodities data was collected from USDA agricultural censuses. County figures for field crops represent the total acres harvested within that county. County figures for livestock represent the total inventory within that county. 

U.S. Drought Monitor (USDM) data from the National Drought Mitigation Center were available in a GIS format.

Source Name

Agricultural Statistics

Data Source Description

Source: USDA National Agricultural Statistics Service

GIS was used to aggregate the number of acres a crop was harvested in a county.

Data Source Type

Water Supply by Watershed Region

Data Sources
Source Name

Daily Streamflow Conditions

Data Source Update Frequency/Last Updated
Updates Daily
Data Source Description

Source: U.S. Geological Survey

Streamflow data were available in a GIS format from the U.S. Geological Survey's WaterWatch.

U.S. Drought Monitor (USDM) data from the National Drought Mitigation Center were available in a GIS format.

Source Name

One-Month Precipitation Outlook

Data Source Update Frequency/Last Updated
Updates Monthly
Data Source Description

Source: Climate Prediction Center

Precipitation data from NOAA's Climate Prediction Center (CPC) were available in a GIS format.

U.S. Drought Monitor (USDM) data from the National Drought Mitigation Center were available in a GIS format.

Source Name

Water Supply Statistics: Streamflow % Above and Below Normal

Data Source Update Frequency/Last Updated
Updates Daily
Data Source Description

Source: U.S. Geological Survey

Summary table information was ingested and parsed to provide statistics at the state level.

Source Name

Water Supply Statistics: Precipitation % Above and Below Normal

Data Source Update Frequency/Last Updated
Updates Monthly
Data Source Description

Source: Climate Prediction Center

Temperature and precipitation data from NOAA's Climate Prediction Center were available in a GIS format for the United States. GIS was used to extract data by state to generate state-level statistics.